Answer

Complete the following passage about energy molecules in the body by using appropriate words from the list to fill the gaps.

sugar              condensation             glycogen                   ester

glucose           liver cells                    glycosidic                   hydrolysis

water               sucrose           monosaccharides      respiration                  store

glycogen is a polysaccharide made from hundreds of a glucose molecules. The molecules are joined by glucose bonds by  a condensation reaction.   This reaction requires that a molecule of water is removed.

We store this polysaccharide in liver cells and muscle cells. They are a short-term energy store that the body can use when muscle cells are working hard. The molecules can easily be broken down to their constituent monosaccharides. Its subunits are easily broken off for use in respiration .

[Total: 9]